Even if it is brand new, the Cake machine is made using different parts on the areas that may touch the food. I believe I've seen some places selling materials to "turn the regular Cricuts into Cake". I have the Cricut Cake Mini so I don't know about those kits, but I do love my Mini just as much as my Cricut Expression for my papercrafts.

http://www.cuttingedgecakeart.com/blog.php#03092010Scroll down and view the comparison of the machines. I have a Cricut Cake and use it to cut paper all the time. I see nothing wrong with using a regular cricut to cut gumpaste or whatever as long as you buy the cake blade and a cake mat. Even though the rollers may touch the gumpaste, it will not come in contact with gumpaste that is going on your cake.